package Thread;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

class MyThreadPool{
    //任务队列
    private BlockingQueue<Runnable> queue = new ArrayBlockingQueue<>(10 );
    //通过这个方法，把任务添加到队列当中
    public void submit(Runnable runnable) throws InterruptedException {
        //此处的拒绝策略，相当于是第五种策略了，阻塞等待（这是下策）
        queue.put(runnable);
    }
    public MyThreadPool(int n){
        //创建n个线程，负责执行上述队列中的任务
        for(int i = 0; i < n; i++){
            Thread t = new Thread(()->{
                //让这个线程，从队列中消费任务，并进行执行
                try {
                    Runnable runnable = queue.take();
                    runnable.run();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            });
            t.start();
        }
    }

}
public class Demo28 {
    public static void main(String[] args) throws InterruptedException {
        MyThreadPool myThreadPool = new MyThreadPool(4);
        for(int i = 0; i < 1000; i++){
            int id = i;//此时捕获的是id不是i了  id没人修改
            myThreadPool.submit(new Runnable() {
                @Override
                public void run() {
                    System.out.println("执行任务"+id);
                }
            });
        }
    }
}
